Jute Material Coursework Example | Topics and Well Written Essays - 1250 words

Jute Material - Coursework Example Due to its resistive nature, the dry jute shows signs of being loaded after 23 milliseconds in the test. As indicated by the graph above the progress that follows soon after is represented by a shoot that is almost linear to the almost 2200 Newton’s mark after which the graph begins a drop, which creates a spike. The drop records a low of slightly above 1500 newton after which more force is applied to the jute where it spikes up to a force of 3300 newton. After which the drop follows. The drop is characterised by spikes resulting from the applied force as depicted in the graph in the twentieth and forty-sixth millisecond gap. The uncharacteristic drops in the loading process indicate a difference in dry jute that is uncharacteristic of the normal loading curve on the solid materials, and it reveals some characteristics of the dry jute.The test time that is recorded by the dry jute on the load increase is approximately 36 milliseconds after which the load is at the peak. The ov erall test records a time of approximately 46 milliseconds. From this, it is evident that the unloading or negative slope part of the graph takes less time compared to that of the loading part. The dry jute graph exhibits some unexpected results. Being a solid material, the graph that was expected on loading should have been characteristically smooth (Rees, 2000, p.123), but in this case, it had recorded instances and occurrence of sharp peaks in both the loading and unloading process.... 21), the fibre loses its elasticity element and enters the permanently deformed state. The fibre lingers shortly in the deformation phase, before suffering a complete breakdown in structure in this state. The breakpoint in the dry jute case is recorded at approximately 20.5 Joules. Wet Jute In construction, Jute is mostly used in its dry form. The presence of fluid in the internal structure of jute affects its mechanical properties as displayed in the graph. The effect of having the fluid in the jute is blown up when the material is put under high deformation forces. The wet jute displays similar properties in the initial test phases as depicted by the graph. The wet jute in this case is raw jute, which has not been pre-processed. It is harvested straight from the farms and used in this experiment. In the first stage of testing, the fibre shows resilience to the impact test forces just as the dry jute. It begins to show signs of deformation slightly before the twenty-third millisecon ds mark. After which it takes on elastic properties as the dry jute, with the graph being more linear-like when compared to the dry jute. The curve leading to permanent deformation in this case tends to arc more and its start point occurs earlier than that of dry jute. The breakpoint of wet jute is recorded at about 17 Joules. However, it takes about 40 milliseconds for the wet jute to get to the breaking point in the graph. Graph 2: Standard force Test time graph By applying standard force on the subjects, it is easy to establish the ultimate and yield stresses on the fibres. The dry and wet jute display different results in the experiment as indicated by Barsom and Rolfe (1999, p. 291). In conducting this experiment, the dry and wet jute